package judesart.app.facebook;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FacebookFilter implements Filter {

    @Override
    public void destroy() {
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        String fbRef = request.getParameter("fb_ref");
        if (fbRef == null || fbRef.trim().length() == 0) {
            chain.doFilter(request, response);
        } else {
            ((HttpServletResponse) response).sendRedirect(((HttpServletRequest) request).getRequestURI()
                    + "#" + fbRef);
        }
    }
}
